Lock-nut.



H. A. -STAUB.

LOCK NUT.L

APPucmon mfp Mlm. l 19u.

1,250,044. y Pmnted 1m11.19i7.

Mu 1li tlm" i 2 attorney drawing.

un rr HERBERT A. sTAUB, or MAsooUTAH, ILLINOIS.

Loox-NUT. Y

l Specification of LettersPatent. j Patented Dec. 1.1,y 1917.

Application led March 1, 1917.. Serial No. 151,819.'

To all whom t may concern.' f f Beit known that I, HERBERT A. STAUB,

a' citizen of the United States, residing` at The present invention has reference generally to improvements in nut Alocks and more particularly relates to a nut lock of a combined bolt and nut type.

As the primary aim and object this invention contemplates the provision of novel locking means pivotally mounted on a nut and adapted for removable locking engagement with a groove in the bolt whereby to prevent retrograde movement of the nut.

It is an equally important object of the present invention to provide novel retaining means pivotally mounted on the nut for cooperation with theV locking member for either holding the locking member in a locked position in the bolt subsequent to the application of the nut on the bolt or for maintaining the locking member in an open position to permit of the ready application of the nut on the bolt.

Among the other aims and objects of the present invention may be recited the provision of a device of the character described with a view to compactness, and in which the number of parts are few, the construction simple, the cost of production low and the efficiency high.l

Other objects as well as the nature, characteristic features and scope of this invention will be more readily apparent from the following description taken in connection with the accompanying drawings and pointed out in the claim, forming a part of this specification.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1 is a perspective showing the nut arranged in a locked position on the bolt.

Fig. 2 is an enlarged transverse section taken through the nut showing the locking member in a locked position on the bolt.

Fig. 3 is a perspective of the nut showing the locking member held in an open position preparatory to being applied to the bolt.

Fig. 4 is ,a top plan view of the nut on the bolt.

Fig. 5 isa perspective detail of one form of-,locking member.

Fig.' 6 is a perspective of the resilient retaining', member. e.

s Fig. 7 is another form ber. A

Similar characters of reference are employed in all of the above described views, to indicate corresponding parts.

of the locking mem- Referring now, more particularly, tothe accompanying drawings, I provide la bolt 1, having the usual -head 2, the outer end of the bolt .being threaded as at 3 and provided with oppositelyl disposed and longitudinally extending grooves 4 for a purpose that will presently appear. Adjustably mounted on the threaded end of the-bolt through the medium ofthe usual adjusting opening 5 is the nut 6. i

With'aview toward providing the improved means for removably holding the nut in an adjusted and locked position on the bolt I have provided theouter face of the nut with a radially arranged recess 7 which communicates with the opening 5. Pivotally mounted through the medium of a suitable pivot pin 8 and in spaced relation to the bottom of the recess is a locking pawl 9. The locking pawl may be formed from a single piece of metal which has one end bent upon itself to provide a finger piece 10 at the inner end and a pivot receiving sleeve 11 adjacent the finger piece as illustrated in Fig. 5 or else it may be formed in a single casting having a pivot receiving sleeve 12 onthe inner end and from which projects a finger piece 13. When applied in the position shown in Fig. 2 the finger piece 10 is arranged adjacent the inner end `of the recess 7 while the elongated engaging end has its terminal arranged in an adjacent groove 4in the bolt, and when in this position it will be apparent that relative movement of the nut with respect to the bolt is prevented.

In order to removably maintain the locking bolt 9 in either a locked position as shown in Fig. 2 or in an open position as illustrated in Fig. 3 there is provided an improved resilient retaining arm 14 the inner end of which is pivotally mounted by means of a suitable fastening device 15 to the outer surface of the nut adjacent the recess while the corners adjacent the outer end are preferably bent downwardly to provide lugs 16 which when the arm is swung over the recess, engage the upper surface of the pawl adjacent the outer end and hold this part of the pawl in engagement with each groove so as to prevent accidental displacement thereof. In order that the pawl may be varranged in the position shown in Fig. 3 the arm is first swung to assume the position illustrated in dotted lines in Fig. 4, that is, substantially parallel with the recess, and the finger piece 10 is pressed downwardly to raise the pawl whereupon the arm is now swung over the groove and beneath the pawl so as to maintain it in a raised position and consequently permit of the removal of the nut from bolt when desired.

It is believed that from the foregoing kdescription that a detailed description cone cerning the operation of the invention is unnecessary and likewise it is thought that the advantages of the present invention when in use will be readily apparent.

It will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of my invention and that various minor changes in detail of construction, proportion and arrangement of the parts may be made within the scope of the appended claim and without. sacrificing any of the advantages of my invention.

v a radially arranged recess communicating with the opening, a locking` pawl pivotally mounted 1n the recess and arranged ,1n spaced `relation tothe bottom thereof and having the elongated engaging end in engagement with one of the grooves in thebolt, a linger piece projecting from the inner end of the pawl for raising the engaging end fromengagement with the groove when desired, a resilient retaining arm pivotally mounted on the outer face of the nut and having lugs on the free extremity thereof for engage.- ment with the upper surface of the engaging end of the pawl to securely hold the pawl in a locked position, and the arm .being also adapted to be arranged beneath the pawl subsequent to the pressing of the finger piece so as to maintain the pawl in a raised position and facilitate the disengagement of the nut from the bolt when desired.

In testimony whereof I affix my signature.

HERBERT STAUB.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, JD. C. 

